i agree with you because time travel in Enterprise is a 1 second thing, they enter one room and poof, no portal, no time frame just pooof, some maybe for all we know the Aquatics never really went into the past, they did their job, and if Daniel did his job right the ship just probably went to the past, only Enterprise, the Aquatics are still in their own time
As for the Reman, I also agree its not a Reman that their trying to portray, its just the cheapos used the Reman mask, might of made some small alterations to it
adam out